One reason i could have a negative affect is that the wildlife there would have no chance to relocate. Another is that it could cause a shortage in food for the prey type animals thinning their population witch in turn would kill off predatory animals and would through the whole ecosystem off balance. Hope it helps :).
Its D Radioactive Dating of Fossils
Answer:
You used too much.
Explanation:
0.4 kilograms is 400 grams